Changes in the response time forVarroa jacobsoniexposed to amitraz
- 1 January 2000
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Apicultural Research
- Vol. 39 (3-4), 155-158
- https://doi.org/10.1080/00218839.2000.11101036
Abstract
Varroosis is a serious parasitic disease of the honey bee caused by Varroa jacobsoni. Varroa must be treated frequently to maintain productive honey bee colonies. In France, four products have been successively used to control varroa, then later abandoned. Amitraz (formamidine), which is currently used in France and other European countries, was studied for efficacy and the possible emergence of resistant mites. We estimated efficacy by determining the ‘mean lethal time’. Mean lethal time increased significantly between a 1995 survey (24.9 ± 1.9 min) with a reference strain of the mite, and a 1998 survey with strains of mites from three regions of France (57.6 ± 3.5, 45.5 ± 3.8, 37.8 ± 3.8 min). These differences suggest that the efficacy of amitraz has decreased.Keywords
This publication has 4 references indexed in Scilit:
- Fluvalinate resistance of Varroa jacobsoni Oudemans (Acari: Varroidae) in Mediterranean apiaries of FranceApidologie, 1997
- Varroose : mise en évidence de la résistance du parasite aux acaricides par la méthode de «détermination du temps létal moyen»Apidologie, 1996
- The resistance of Varroa jacobsoni Oud to pyrethroids: a laboratory assayApidologie, 1995
- Mise en évidence d'une diminution de l'efficacité de l'Apistan® utilisé contre la varroose de l'abeille (Apis mellifera L)Apidologie, 1995